Ooh, another guy that fancies himself a lawyer.
Not at all. It doesn't make me a lawyer just because I made a better point.
If anything it was just an extension of your point that the tenent accepts the landlord's rights to impose certain restrictions. The landlord similarly accepts that the tenent has rights which can't be negated by contract. That's the balance. I'm going with flag on pole on balcony in clear view: ok. Flag secured to structure: not ok. Point being there's a balance to be struck between the parties, no?
It's not a case of anything the owner says goes so long as it's written up and signed, which seems to be your mistaken belief. There's probably a lawyerly term for contracts like that. Easily invalidated?